1 files changed, 59 insertions, 0 deletions
diff --git a/libs/libsodium/src/crypto_scalarmult/curve25519/scalarmult_curve25519.c b/libs/libsodium/src/crypto_scalarmult/curve25519/scalarmult_curve25519.c
new file mode 100644
index 0000000000..2d3ffc0563
--- /dev/null
+++ b/libs/libsodium/src/crypto_scalarmult/curve25519/scalarmult_curve25519.c
@@ -0,0 +1,59 @@
+
+#include "crypto_scalarmult_curve25519.h"
+#include "private/implementations.h"
+#include "scalarmult_curve25519.h"
+#include "runtime.h"
+
+#ifdef HAVE_AVX_ASM
+# include "sandy2x/curve25519_sandy2x.h"
+#endif
+#include "ref10/x25519_ref10.h"
+static const crypto_scalarmult_curve25519_implementation *implementation =
+    &crypto_scalarmult_curve25519_ref10_implementation;
+
+int
+crypto_scalarmult_curve25519(unsigned char *q, const unsigned char *n,
+                             const unsigned char *p)
+{
+    size_t                 i;
+    volatile unsigned char d = 0;
+
+    if (implementation->mult(q, n, p) != 0) {
+        return -1; /* LCOV_EXCL_LINE */
+    }
+    for (i = 0; i < crypto_scalarmult_curve25519_BYTES; i++) {
+        d |= q[i];
+    }
+    return -(1 & ((d - 1) >> 8));
+}
+
+int
+crypto_scalarmult_curve25519_base(unsigned char *q, const unsigned char *n)
+{
+    return implementation->mult_base(q, n);
+}
+
+size_t
+crypto_scalarmult_curve25519_bytes(void)
+{
+    return crypto_scalarmult_curve25519_BYTES;
+}
+
+size_t
+crypto_scalarmult_curve25519_scalarbytes(void)
+{
+    return crypto_scalarmult_curve25519_SCALARBYTES;
+}
+
+int
+_crypto_scalarmult_curve25519_pick_best_implementation(void)
+{
+    implementation = &crypto_scalarmult_curve25519_ref10_implementation;
+
+#ifdef HAVE_AVX_ASM
+    if (sodium_runtime_has_avx()) {
+        implementation = &crypto_scalarmult_curve25519_sandy2x_implementation;
+    }
+#endif
+    return 0;
+}